Analysis of the Causes of the Dithering of the Pointer of the Metal Tube Float Flow Meter

Abstract: The analysis information of the pointer jitter of the metal tube float flowmeter is provided by the excellent flowmeter and flowmeter manufacturers and quotation manufacturers. When the measured medium flows through the measuring tube from bottom to top, the upper and lower ends of the float generate differential pressure to form a lift force. When the lift force on the float is greater than the weight of the float immersed in the fluid, the float will rise, and the area of ​​the annulus will follow. Increase, the fluid velocity at the annular gap. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following is the details of the article on the analysis of the cause of the pointer jitter of the metal tube float flowmeter. When the measured medium flows through the measuring tube from bottom to top, the upper and lower ends of the float generate differential pressure to form a lift force. When the lift force on the float is greater than the weight of the float immersed in the fluid, the float will rise, and the area of ​​the annulus will follow. Increases, the fluid velocity at the annular gap drops rapidly, the differential pressure at the upper and lower ends of the float decreases, and the lifting force acting on the float decreases along with it, until the lifting force is balanced with the weight of the float immersed in the fluid, the float is stable at the * position, the float The height of the position corresponds to the flow rate of the measured medium. The float has a built-in magnetic steel. When the float moves up and down with the medium, the magnetic field changes with the movement of the float. The change of the magnetic field is converted into an electrical signal by a magnetic sensor, and the instantaneous flow and the cumulative flow are displayed through analog-to-digital conversion, digital filtering, temperature compensation, microprocessor processing, digital-to-analog conversion, liquid crystal display, and switch control output. control. 1. The pointer of the metal tube rotameter shakes: 1. The pointer of the metal tube rotameter slightly shakes: generally caused by the fluctuation of the medium. It can be overcome by increasing damping. 2. Moderate jitter of the pointer: generally caused by the flow state of the medium. For gas, it is generally caused by the unstable operating pressure of the medium. A constant voltage or constant flow device can be used to overcome or increase the gas damping of the rotameter. 3. The pointer shakes violently: mainly due to medium pulsation, unstable air pressure, or the pressure, temperature, and flow rate of the gas operating state given by the user do not match the actual state of the metal tube rotameter. 2. The pointer of the metal tube rotameter is stuck. The pointer of the metal tube rotameter is stuck. It may be because the valve is opened too fast when the metal tube rotameter is used for the first time, so that the float quickly hits the stopper and causes the stopper to deform. And the float is stuck. However, it is not excluded that the float is stuck due to the misalignment of the float guide rod and the stop ring. When handling, remove the meter, remove the deformed stopper and reshape it, and check whether it is concentric with the guide rod. If it is not concentric, it can be corrected, then install the float, push the float by hand, and feel that the float is unobstructed up and down. Yes, in addition, when installing the metal tube rotameter, it must be installed vertically or horizontally, and cannot be tilted, otherwise it will easily cause the meter to jam and bring errors to the measurement. The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'Analysis of the Causes of the Dithering of the Pointer of the Metal Tube Float Flow Meter'

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